body
{
   width: 760px;
  
   margin-top: 100px;
   margin-bottom: 0px;  
   
   background-color: silver;
}
#corps
{
 margin-left: 50px;
   margin-bottom: 20px;
  padding:5px;

   
   background-color: white;
border:1px solid white;
  
}
